Investigators on Friday charged Timothy Dwayne Fisher, 25, with involuntary manslaughter in the case, the sheriff's office told CNN. The charge carries a maximum of five years in prison.

Another friend, Taylor Ann Kelly, 18, was charged with accessory after the fact for concealing information in the case, said sheriff's Lt. Sheila Cole. That charge carries a prison term of up to three years.

Wardell had been hanging out with a group of friends Tuesday night when they decided to try on the vest and have someone shoot them, McCown told WHNS.

Investigators said when it was Wardell's turn wearing the vest, the .22 long rifle bullet missed the Kevlar portion and hit him in the chest.

The investigation is continuing, Cole said, and more charges are anticipated.